Packin-g-bakma-powder



(No Model.)

W. P. CLOTWORTHY.

PACKING BAKING POWDER.

Patented 001;.27, 1891.

Soda mind ' UN TED STATES ATENT Grinch,

WILLIAM PITTZCLOTWORTEHZ, or BAL -IMORE, MARYLAND.

PACKING BAKING-POWDER.

srnc mon'rron forming part of Letters Patent No. 462,109, dated October 27, 18 91.

Application.filedoctoherll,1890- Serla1No. 367,828 ,(Nomodeh) i To all whom it may-concern;

Be it known that I, WILLIAM PITTICLOT- WoRTHY, a citizen of the United-States, residing at the city of Baltimore, in'the State of Marylandghave invented a new and useful Improvement inthe Packing of Baking-Powders; and I do herebydeclare that the following is a full, clear, and exact descri'ptionof my invention, which will enable others skilled in the 'a'rtto which it appertains to make and use the same by my novel method.

My invention relates to an improvement in packing baking-powders, which I accomplish by so combining theconstituents thatno loss of aerating power "will take place, by the acid constituents acting on the carbonated alkali.

, Atthe present time theuni-versal practice of the manufacturers of thebaking-powders of commerce is to mix theacid,'the carbonate, and'st'arch or flour all together; The starch or flour is'used to, prevent the rap d deterioration of strength necessarily caused' by reason oh. the action of the acid on the carbonate.

' Experience has proved that the starch or flour only serves to retard deterioration, andthat it is simply a question of time when the whole strength will have been lost.

This is particularly the case when the acid phosphate of lime and the bicarbonateof, soda are used. The acid phosphate of little is by all scientific authorities on the subject conceded to be the best acid for bread-making.

- In carrying my invention into effectI arrange the constituents in layers or strata in small packages, so that although the layers come in contact the materials are notmixed. Thepackages may be of tin, wood, or other suitable material.

Reference is hereby made to the drawing, in

which A represents the receptacle, B the bicarbonate of soda, 0 the neutral salt, and D the acid.

which is a virtual. separator. This method I consider a novel and valuable improvement on the present generalpractice.

It is gen'erally'known that thereis a rapid deterioration in the strength of the principal baking-powders on the market, so that ifthe powders are not fresh or the packages have been opened they are in a great degree of 'no Value. My improvement is applicable to all the acids and carbonates used in the making ofbread. By the term carbonates I mean the alkaline carbonates and bicarbonates.

I am aware that substantially-the same materials have heretofore been used iITthe'co.m-

position of baking-powders, and therefore do not claim, such a composition, broadly; and I am also aware offthe useof a methodof separating the ingredients by a partition .inthe box, thus making separate compartments, and therefore do not claim anysuch means; but What I do claim as my invention, and desire to secure by'Letters Patent, is

As an article of manufacture, a packa'ge of baking-powders consistingof a suitable re,-

ceptacle A, containingtheacid-D and carbou- .ated alkali B, placed with their contiguous layers in contact, whereby a dividing-layer of a chemical salt 0 is formed between the two bodies, substantially as described.

WM. PITT CLOTWORTHY'. Witnesses: 

